Their high energy density, fewer corrosion issues and lower operating temperature make fuel cells promising candidates for various applications. In addition to the favorable proton conductivity, the electrolyte membranes showed excellent thermal and mechanical stability taken together, these results indicate that the composite membranes based on SPEEK with SWCNT and fly ash can be viable candidates for use as an electrolyte membrane in fuel cell applications.įuel cells have been receiving increasing attention because of their application in stationary and mobile electronic devices and their automotive applications.
The membrane electrode assemblies were successfully fabricated for the pristine SPEEK and SP-CNT-FA-6 membranes, and their electrochemical performance was studied throughout the current density range. The SP-CNT-FA-8 membrane exhibited the highest proton conductivity of 0.027 S cm −1 at 30 ☌ and 0.034 S cm −1 at 90 ☌, whereas the pristine membrane exhibited conductivities of 0.019 S cm −1 at 30 ☌ and 0.031 S cm −1 at 90 ☌. The physicochemical properties of the prepared membranes were studied to evaluate their suitability for fuel cell applications. Scanning electron microscopy and X-ray diffraction analyses confirmed the incorporation of nanofillers into the polymer matrix. The degree of sulfonation of poly (ether ether ketone) was determined by proton nuclear magnetic resonance spectroscopy analysis and was found to be 64%. Sulfonated poly (ether ether ketone) (SPEEK)-based polymer nanocomposite membranes containing single-walled carbon nanotubes (SWCNTs) and fly ash as inorganic fillers have been prepared using a solution casting technique.
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